Induction system for a multi-cylinder combustion engine

摘要

At the opening (11) of the inlet manifold (10), a long inlet tract (13) and a short tract (19) split from each other. They rejoin just before the connection (17) of the manifold to the inlet valve in the cylinder block. Matching tracts (14, 22) serve the opposing bank of cylinders. The shorter tract has a pipe (23) sitting in it perpendicularly, that acts as a valve. The pipe is as long as the depth of manifold required to service all the cylinders. It is restrained at one end by a low-friction bearing and at the other by a mechanical spring. Rotation of the pipe enables the short tract to be opened/closed as required for max. efficiency. Both the manifold and the pipe are mfd. of plastics.